Latest results from the NEWS-G dark matter experiment
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90263%2F24%3A00381667" target="_blank" >RIV/68407700:90263/24:00381667 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.22323/1.441.0042" target="_blank" >https://doi.org/10.22323/1.441.0042</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.22323/1.441.0042" target="_blank" >10.22323/1.441.0042</a>
Alternative languages
Result language
angličtina
Original language name
Latest results from the NEWS-G dark matter experiment
Original language description
In the Fall of 2019, the NEWS-G experiment used its latest detector, a 140 cm diameter Spherical Proportional Counter (SPC) to search for low-mass dark matter at the Laboratoire souterrain de Modane (LSM) in France. The detector has then been moved to SNOLAB in Canada and has taken data since the Fall of 2022. SPCs are metallic spheres filled with gas, with a high-voltage anode at the centre that attracts and amplifies ionization charges from atomic recoils. Having the sphere filled with pure methane, hydrogen was used as the target to produce new limits on the proton spin-dependent cross-section around masses of 1 GeV. This paper first introduces the NEWS-G experiment and describes the commissioning at the LSM with the shielding used, the SPC detection principle and the new multi-anode sensor. It then focuses on the calibrations using a UV laser and 37Ar, as well as the background discrimination methods to remove α-particle induced events and spurious pulses. Then, it presents the profile likelihood ratio method that was used to derive constraints on WIMP mass and cross-section. Finally, it describes the status of the recent data taken at SNOLAB and mentions future projects.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
—
Continuities
—
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proc. XVIII International Conference on Topics in Astroparticle and Underground Physics
ISBN
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ISSN
1824-8039
e-ISSN
1824-8039
Number of pages
5
Pages from-to
1-5
Publisher name
Sissa Medialab Srl
Place of publication
Trieste
Event location
Vienna
Event date
Aug 28, 2023
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001327036000023